(KMOV) – Pharmacists in Missouri are trying to stay one-step ahead after two arrests were made in the last few days dealing with fraudulent prescriptions.

Chesterfield police have made two arrests this week after they say people called pharmacies and fraudulently attempted to get a prescription by saying they were a doctor or worked for one.

Some pharmacies have taken steps used to stop criminals from getting their hands on heavy duty painkillers.

Computer programs that alert pharmacists if an individual attempts to refill a prescription too soon do exist.Additionally, many prescriptions have the capability to be sent electronically from doctor to pharmacy to prevent forgeries.

However, Andrew Stolzer, a pharmacist at Barnes Jewish Hospital says it comes down to the pharmacist to stay alert for red flags.

“When we are getting new prescriptions, especially new prescriptions that are called in, we have to be a little bit more vigilant and watching out for fake prescriptions,” he said.

Missouri is one of two states that doesn’t have a prescription drug monitoring program.The electronic database tracks the dispensing of drugs like Oxycontin and Xanax.

Legislation has been proposed this year to set up a program, but has not passed.